Compare · ModelsLive · 2 picked · head to head
Claude Sonnet 5 vs DeepSeek V4 Flash
Side by side · benchmarks, pricing, and signals you can act on.
Winner summary
Claude Sonnet 5 wins on 4/4 benchmarks
Claude Sonnet 5 wins 4 of 4 shared benchmarks. Leads in general · reasoning · coding.
Category leads
general·Claude Sonnet 5reasoning·Claude Sonnet 5coding·Claude Sonnet 5
Hype vs Reality
Attention vs performance
Claude Sonnet 5
#66 by perf·#10 by attention
DeepSeek V4 Flash
#39 by perf·#6 by attention
Best value
DeepSeek V4 Flash
10.0x better value than Claude Sonnet 5
Claude Sonnet 5
9.5 pts/$
$6.00/M
DeepSeek V4 Flash
94.4 pts/$
$0.65/M
Vendor risk
Mixed exposure
One or more vendors flagged
Anthropic
$965.0B·Tier 1
DeepSeek
$3.4B·Tier 1
Head to head
4 benchmarks · 2 models
Claude Sonnet 5DeepSeek V4 Flash
Dtbench
Claude Sonnet 5 leads by +10.1
Claude Sonnet 5
87.5
DeepSeek V4 Flash
77.3
Lmca
Claude Sonnet 5 leads by +16.6
Claude Sonnet 5
58.9
DeepSeek V4 Flash
42.2
SimpleBench
Claude Sonnet 5 leads by +17.2
SimpleBench · tests fundamental reasoning capabilities with straightforward problems designed to expose gaps in basic logical and spatial thinking.
Claude Sonnet 5
52.7
DeepSeek V4 Flash
35.6
WeirdML
Claude Sonnet 5 leads by +23.1
WeirdML · tests models on unusual and adversarial machine learning tasks that require creative problem-solving beyond standard patterns.
Claude Sonnet 5
68.8
DeepSeek V4 Flash
45.6
Full benchmark table
| Benchmark | Claude Sonnet 5 | DeepSeek V4 Flash |
|---|---|---|
Dtbench | 87.5 | 77.3 |
Lmca | 58.9 | 42.2 |
SimpleBench SimpleBench · tests fundamental reasoning capabilities with straightforward problems designed to expose gaps in basic logical and spatial thinking. | 52.7 | 35.6 |
WeirdML WeirdML · tests models on unusual and adversarial machine learning tasks that require creative problem-solving beyond standard patterns. | 68.8 | 45.6 |
Pricing · per 1M tokens · projected $/mo at 10M tokens
| Model | Input | Output | Context | Projected $/mo |
|---|---|---|---|---|
| $2.00 | $10.00 | 1.0M tokens (~500 books) | $40.00 | |
| $0.03 | $1.28 | 1.0M tokens (~524 books) | $3.39 |
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